DES MOINES, Iowa — Cora Smith walked out of Winterset's High School Tuesday with a bisexual pride flag draped over her shoulders. The 10th grader was among more than 100 students who walked out a in protest over the school district placing seventh-grade literacy teacher Lucas Kaufmann on leave. Kaufmann was placed on leave last week following a presentation about himself to his class featured the LGBT Pride flag, according to a www.change.org petition. When asked by students, Kaufmann said he was bisexual. Nearly 1,500 people have signed the online petition. "We're hoping that this will help Mr. Kaufmann," Smith...